Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 216)

<Appendix 1 For pH/ORP>
App.1-4
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
0 10 20 30 40 50
0
100
200
300
400
500
600
Temperature (°C)
Oxidation-reduction potential (mV)
Ferrous solution
Quinhydrone solution
Tolerable range
Tolerable range
Figure 1 Oxidation-reduction Potential Given by Checking Solution